static bool Show = false;
static void NewWindow(bool* open)
{
ImGui::SetNextWindowPos(ImVec2(100,100));
if (!ImGui::Begin("Name", open, youFlagWindow))
{
ImGui::End();
return;
}
ImGui::Text("Opa-pa");
ImGui::End();
}
//................
if(ImGui::Button("Open" ))Show^=1;
if(Show)
NewWindow(&Show);
//...................